DDR2 and laryngotracheoesophageal cleft: The average mutation burden of PTEN, APOB, FRAS1, KDM6A, DDR2, TTK, NRAS, TP53, PTPRB, MPL, FCRL1, HN1, and SFN gradually increased from CHB and LC to HCC (Figures 3(a) and 3(b)).